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Question: Answered & Verified by Expert
A light ray of wavelength $\lambda$ is passing through a pin hole of diameter $D$ and the effect is observed on a screen placed at a distance $L$ from the pin hole. The approximations of geometrical optics are applicable, if
PhysicsWave OpticsAP EAMCETAP EAMCET 2005
Options:
  • A $D \leq \lambda$
  • B $\frac{L \lambda}{D^2}=1$
  • C $\frac{L \lambda}{D^2}< < 1$
  • D $\frac{L \lambda}{D^2}>>1$
Solution:
2863 Upvotes Verified Answer
The correct answer is: $\frac{L \lambda}{D^2}< < 1$
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